KR970076460A - Liquid crystal display (LCD) drive circuit - Google Patents

Liquid crystal display (LCD) drive circuit Download PDF

Info

Publication number
KR970076460A
KR970076460A KR1019960014279A KR19960014279A KR970076460A KR 970076460 A KR970076460 A KR 970076460A KR 1019960014279 A KR1019960014279 A KR 1019960014279A KR 19960014279 A KR19960014279 A KR 19960014279A KR 970076460 A KR970076460 A KR 970076460A
Authority
KR
South Korea
Prior art keywords
voltage
decoder
group
voltage source
data
Prior art date
Application number
KR1019960014279A
Other languages
Korean (ko)
Other versions
KR100209644B1 (en
Inventor
김준희
Original Assignee
구자홍
Lg 전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 구자홍, Lg 전자주식회사 filed Critical 구자홍
Priority to KR1019960014279A priority Critical patent/KR100209644B1/en
Publication of KR970076460A publication Critical patent/KR970076460A/en
Application granted granted Critical
Publication of KR100209644B1 publication Critical patent/KR100209644B1/en

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

본 발명은 하나의 데이타 드라이버에서 라인(Line), 컬럼(Column), 돗트 인버전(Dot Inversion)의 절환이 가능한 액정표시소자 구동회로에 관한 것으로서, 특히 수평동기 주파수와 수직동기 주파수에 동기시킨 제어신호를 발생하고 상기 제어신호에 의해 전압극성이 상호변화하는 제1군의 전압원과 제2군의 전압원을 발생시키는 다계조 전압발생회로와, 소정 비트의 디지탈 화상 데이타를 샘플링하여 1라인분 단위로 출력하는 데이타 입력 회로와, 상기 데이타 입력회로에서 출력되는 1라인분의 샘플링 데이타중 소스라인의 홀수번째 라인으로 추력되는 데이타를 상기 다계조 전압 발생수단에서 발생된 +또는 -의 계조 전압으로 디코딩하는 제1디코더와, 상기 데이타 입력회로에서 출력되는 1라인분의 샘플링 데이타중 소스라인의 짝수번째 라인으로 출력되는 데이타를 상기 다계조 전압 발생수단에서 발생된 +또는 -의 계조 전압으로 디코딩하는 제2디코더와, 상기 제1디코더에는 상기 다계조 전압 발새우단의 어느 한군의 전압원을 직접 제공하고 제2디코더에는 제1군과 제2군의 전압원중 어느 한군의 전압원을 선택하여 제공하는 계조전압 출력부로 구성되어, 컬럼, 라인, 돗트, 인버전간의 절환이 용이하면서 데이타 전압의 극성 반전이 보다 용이해 진다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display element driving circuit capable of switching a line, a column, and a dot inversion in one data driver, A plurality of gradation voltage generating circuits for generating a first group of voltage sources and a second group of voltage sources which generate signals and whose voltage polarities are mutually changed by the control signals; And a data input circuit for outputting the data to the odd numbered line of the source line among the sampling data for one line outputted from the data input circuit to the + or - gradation voltage generated by the multi-gradation voltage generating means A first decoder and an even-numbered line of a source line among the sampling data of one line outputted from the data input circuit A first decoder for directly supplying a voltage source of one of the group of the multi-gradation voltage sources to the first decoder and a second decoder for applying a voltage to the second decoder, And a grayscale voltage output unit for selecting and providing a voltage source of any one of the first and second groups of voltage sources. Thus, the polarity inversion of the data voltage can be facilitated while switching between the column, line, dot, and inversion is easy.

Description

액정표시소자(LCD) 구동회로Liquid crystal display (LCD) drive circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제3도는 본 발명에 따른 LCD 구동회로에서 다계조 전압생성회로의 상세 블럭도, 제4도는 상기 제3도의 스위칭 제어부의 상세 회로도, 제5도는 상기 제4도의 각부의 동작 타이밍도, 제6도는 상기 제3도의 다계조 전압생성회로를 이용한 본 발명에 따른 LCD 구동 회로도, 제7도는 상기 제6도의 상세 블럭도, 제8도는 상기 제6도 및 제7도의 디코더의 상세 블럭도.3 is a detailed block diagram of the multi-gradation voltage generating circuit in the LCD driving circuit according to the present invention, Fig. 4 is a detailed circuit diagram of the switching control section of Fig. 3, Fig. 5 is an operational timing diagram of each part in Fig. FIG. 7 is a detailed block diagram of FIG. 6, and FIG. 8 is a detailed block diagram of the decoder of FIG. 6 and FIG. 7, which is an LCD driving circuit according to the present invention using the multi-gradation voltage generating circuit of FIG.

Claims (9)

수평동기 주파수와 수직동기 주파수에 동기시킨 제어신호를 발생하고 상기 제어신호에 의해 전압 극성이 상호 변화하는 제1군의 전압원과 제2군의 전압원을 발생시키는 단계조 전압발생회로와, 소정 비트의 디지탈 화상 데이타를 샘플링하여 1라인분 단위로 출력하는 데이타 입력 수단과, 상기 데이타 입력수단에서 출력되는 1라인분의 샘플링 데이타중 소스라인의 홀수번째 라인으로 출력되는 데이타를 상기 다계조 전압 발생수단에서 발생된 +또는 -의 계조 전압으로 디코딩하는 제1디코더와, 상기 데이타 입력 수단에서 출력되는 1라인분의 샘플링 데이타중 소스라인의 짝수번째 라인으로 출력되는 데이타를 상기 다계조 전압 발생수단에서 발생된 +또는 -의 계조 전압으로 디코딩하는 제2디코더와, 상기 제1디코더에는 상기 다계조 전압 발생수단의 어느 한군의 전압원을 직접 제공하고 제2디코더에는 제1군과 제2군의 전압원중 어느 한군의 전압원을 선택하여 제공하는 계조전압 출력수단을 구비함을 특징으로 하는 액정표시소자 구동회로.A step voltage generation circuit for generating control signals synchronized with a horizontal synchronization frequency and a vertical synchronization frequency and generating a voltage source of a first group and a voltage source of a second group in which the voltage polarities are mutually changed by the control signal, A data input means for sampling the digital image data and outputting the digital image data in units of one line; and a data output means for outputting data outputted to the odd-numbered line of the source line among the sampling data for one line outputted from the data input means, A first decoder which decodes the generated data into the gradation voltages of + or -; and a second decoder which decodes the data outputted to the even-numbered lines of the source lines among the sampling data of one line outputted from the data input means, A second decoder for decoding the gradation voltage with a gradation voltage of + or - A liquid crystal display element drive circuit, characterized in that the voltage source provides the feel nowhere else directly and the second decoder is provided with a gray scale voltage outputting means provided by selecting the voltage source the voltage source which nowhere else in the first group and second group. 제1항에 있어서, 상기 다계조 전압 발생수단은, 1H(1H:수평주사기가)주기로 반전하는 신호(HS), 1V(1V:수직주사기간)주기로 반전하는 신호(VS), HS 선택신호(HSS), 및 VS 선택신호(VSS)를 논리조합하여 제어신호를 출력하는 스위칭 제어부와, 상기 스위칭 제어부의 제어신호와 반전된 제어신호를 이용하여 V+ 또는 V-전압을 선택 출력하는 선택부와, 상기 선택부의 출력을 미리 설정된 기준전압과 비교하여 (+)의 m(m은 2이상의 정수)레벨 계조전압과(-)의 m레벨 계조전압을 발생하고 (+)의 m레벨 계조전압과(-)의 m레벨 계조전압을 제1군의 전압원과 제2구의 전압원으로 설정하는 다계조 전압 발생부를 포함함을 특징으로 하는 액정표시소자 구동회로.The display device according to claim 1, wherein the multi-gradation voltage generating means comprises: a signal (HS) inverted in a 1H (horizontal scanning direction); a signal (VS) inverted in a period of 1V HSS), and a VS selection signal (VSS), and a selection unit for selectively outputting a V + or V- voltage using a control signal inverted from the control signal of the switching control unit, (+) M level gradation voltage and (-) m level gradation voltage by comparing the output of the selection section with a predetermined reference voltage to generate m (m is an integer of 2 or more) level gradation voltage and (- And a multi-gradation voltage generator for setting the m-level gradation voltage of the first group to a voltage source of the first group and a voltage source of the second group. 제1항 또는 제2항에 있어서, 상기 다계조 전압 발생수단은 수평주사기간마다 또는 수직주사기간마다 극성이 다른 m레벨의 다계조 전압을 발생함을 특징으로 하는 액정표시소자 구동회로.The liquid crystal display element driving circuit according to claim 1 or 2, wherein the multi-gradation voltage generating means generates multi-gradation voltages of m levels having different polarities every horizontal scanning period or vertical scanning period. 제1항 있어서, 상기 다계조 전압 발생수단의 제1군의 전압원과 제2군의 전압원은 상호 다른 극성의 전압을 공급함을 특징으로 하는 액정표시소자 구동회로.2. The liquid crystal display element driving circuit according to claim 1, wherein the voltage source of the first group and the voltage source of the second group of the multi-gradation voltage generation means supply voltages of mutually different polarities. 제1항 있어서, 상기 제1디코더와 제2디코더는 입력되는 전압원과 전압원의 극성에 따라 샘플링된 디지탈 화상 데이타를 라인 인버전 시킴을 특징으로 하는 액정표시소자 구동회로.2. The liquid crystal display element driving circuit according to claim 1, wherein the first decoder and the second decoder line-in-time digital image data sampled according to an input voltage source and a polarity of a voltage source. 제1항 있어서, 상기 제1디코더와 제2디코더는 입력되는 전압원과 전압원의 극성에 따라 샘플링된 디지탈 화상 데이타를 컬럼 인버전 시킴을 특징으로 하는 액정표시소자 구동회로.The driving circuit according to claim 1, wherein the first decoder and the second decoder convert the digital image data sampled according to the polarities of the input voltage source and the voltage source into a column. 제1항 있어서, 상기 제1디코더와 제2디코더는 입력되는 전압원과 전압원의 극성에 따라 샘플링된 디지탈 화상 데이타를 돗트 인버전 시킴을 특징으로 하는 액정표시소자 구동회로.The driving circuit according to claim 1, wherein the first decoder and the second decoder dots the sampled digital image data according to the polarities of the input voltage source and the voltage source. 제1항 있어서, 상기 선택부에서 선택 출력되는 +전압과 -전압은 가장 높은 게조전압임을 특징으로 하는 액정표시소자 구동회로.The liquid crystal display element driving circuit according to claim 1, wherein the positive voltage and the negative voltage selected by the selector are the highest bass voltage. 제1항 있어서, 상기 제1디코더에는 사이 다계조 전압 발생수단의 제1군과 제2군의 전압원중 어느 한군의 전압원을 선택하여 제공하고 제2레코더에는 상기 다계조 전압 발생수단의 어느 한군의 전압원을 직접 제공하는 계조전압 출력수단을 구비함을 특징으로 하는 액정표시소자 구동회로.The apparatus according to claim 1, wherein a voltage source of one of the first group and the second group of voltage sources of the crosstalk voltage generating means is selected and provided to the first decoder, and one of the groups of the multi- And a grayscale voltage output means for directly supplying a voltage source to the liquid crystal display element. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960014279A 1996-05-02 1996-05-02 Driving circuit for liquid crystal device KR100209644B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960014279A KR100209644B1 (en) 1996-05-02 1996-05-02 Driving circuit for liquid crystal device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960014279A KR100209644B1 (en) 1996-05-02 1996-05-02 Driving circuit for liquid crystal device

Publications (2)

Publication Number Publication Date
KR970076460A true KR970076460A (en) 1997-12-12
KR100209644B1 KR100209644B1 (en) 1999-07-15

Family

ID=19457580

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960014279A KR100209644B1 (en) 1996-05-02 1996-05-02 Driving circuit for liquid crystal device

Country Status (1)

Country Link
KR (1) KR100209644B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100486228B1 (en) * 1998-01-06 2005-06-16 삼성전자주식회사 Contrast voltage control circuit for driving liquid crystal device
KR100490047B1 (en) * 1998-05-22 2005-08-01 삼성전자주식회사 Programmable Gradient Drive
KR100569734B1 (en) * 1997-12-31 2006-08-18 삼성전자주식회사 Programmable gamma reference voltage generator and liquid crystal display using the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3638121B2 (en) * 2000-10-19 2005-04-13 シャープ株式会社 Data signal line driving circuit and image display apparatus including the same
KR100472360B1 (en) * 2001-12-08 2005-03-08 엘지.필립스 엘시디 주식회사 Liquid crystal display device and driving method thereof
KR100926888B1 (en) * 2002-12-31 2009-11-16 엘지디스플레이 주식회사 Driving Method of LCD

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100569734B1 (en) * 1997-12-31 2006-08-18 삼성전자주식회사 Programmable gamma reference voltage generator and liquid crystal display using the same
KR100486228B1 (en) * 1998-01-06 2005-06-16 삼성전자주식회사 Contrast voltage control circuit for driving liquid crystal device
KR100490047B1 (en) * 1998-05-22 2005-08-01 삼성전자주식회사 Programmable Gradient Drive

Also Published As

Publication number Publication date
KR100209644B1 (en) 1999-07-15

Similar Documents

Publication Publication Date Title
USRE39366E1 (en) Liquid crystal driver and liquid crystal display device using the same
US6118421A (en) Method and circuit for driving liquid crystal panel
KR940022137A (en) Display device and driving method of display device
KR20080054190A (en) Display apparatus and method of driving the same
KR900016936A (en) Driving device for driving matrix LCD device
KR970022922A (en) Voltage output circuit and image display device
KR20050054447A (en) Display device, driver circuit therefor and method of driving same
JPH06348235A (en) Liquid crystal display device
KR101492885B1 (en) Driving circuit and Liquid crystal display having the same
KR970076460A (en) Liquid crystal display (LCD) drive circuit
JP2010281981A (en) Liquid crystal display device
KR101363652B1 (en) LCD and overdrive method thereof
KR20030055921A (en) Liquid crystal display apparatus driven 2-dot inversion type and method of dirving the same
KR20040016029A (en) Method and apparatus for driving liquid crystal display
KR100606973B1 (en) A driving circuit of a liquid crystal display device and a method for driving the same
KR20080025228A (en) Apparatus and method for driving liquid crystal display device
KR940022149A (en) Liquid crystal display device
JP2007264368A (en) Liquid crystal display device
JP3309934B2 (en) Display device
JP2007156336A (en) Liquid crystal display device and driving method thereof
JP2004348122A (en) Liquid crystal display panel driving device and liquid crystal display
KR930010837A (en) Drive circuit for display device with digital source driver that can generate multi-level driving voltage from one external power source
KR100864975B1 (en) Apparatus and method of driving liquid crystal display device
JPH07120725A (en) Driving method for liquid crystal display device and liquid crystal display device
KR0182047B1 (en) Generating device of programmable grey-scale voltage

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20120330

Year of fee payment: 14

FPAY Annual fee payment

Payment date: 20130329

Year of fee payment: 15

FPAY Annual fee payment

Payment date: 20160329

Year of fee payment: 18

EXPY Expiration of term